Question

Assertion (A): The analogous organ to the vermiform appendix in herbivorous mammals is quite helpful in digesting cellulose. But it is considered a vestigial organ in humans.

Reason (R): Vermiform appendix is a wide worm-like tubular structure, projecting from the blind part of the colon (a part of large intestine). Its function is the same as that of the colon, i.e. absorption of water and some remnants of digested food.

1. A is True and R is False.
2. A is False and R is True.
3. Both A and R are True.
4. Both A and R are False.

Options

• (1)

• (2)

• (3)

• (4)

Answer 1

(1)

Explanation:

In herbivorous mammals, the corresponding caecal/appendicular region is well developed and helps digest cellulose with the help of microorganisms. In humans, the vermiform appendix is generally considered a vestigial organ in school-level biology. Therefore, the Assertion (A) is true.

The vermiform appendix is a narrow, worm-like tubular structure arising from the caecum, not a wide structure performing the same function as the colon. It is not mainly responsible for absorption of water and remnants of digested food. Therefore, the Reason (R) is false.

Hence, A is true and R is false.